/*
* Copyright (c) 2008, 2009, 2010, 2011
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#define _GNU_SOURCE
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifdef HAVE_MADVISE
# include <sys/mman.h>
#else
# define madvise(addr, len, advise)
#endif
#import "OFString.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidEncodingException.h"
#import "OFInvalidFormatException.h"
#import "OFOutOfMemoryException.h"
#import "OFOutOfRangeException.h"
#import "macros.h"
#import "of_asprintf.h"
#import "unicode.h"
@implementation OFMutableString
- (void)_applyTable: (const of_unichar_t* const[])table
withSize: (size_t)table_size
{
of_unichar_t c;
of_unichar_t *ustr;
size_t ulen, nlen, clen;
size_t i, j, d;
char *nstr;
if (!isUTF8) {
assert(table_size >= 1);
uint8_t *p = (uint8_t*)string + length;
uint8_t t;
while (--p >= (uint8_t*)string)
if ((t = table[0][*p]) != 0)
*p = t;
return;
}
ulen = [self length];
ustr = [self allocMemoryForNItems: [self length]
withSize: ulen];
i = 0;
j = 0;
nlen = 0;
while (i < length) {
clen = of_string_utf8_to_unicode(string + i, length - i, &c);
if (clen == 0 || c > 0x10FFFF) {
[self freeMemory: ustr];
@throw [OFInvalidEncodingException newWithClass: isa];
}
if (c >> 8 < table_size) {
of_unichar_t tc = table[c >> 8][c & 0xFF];
if (tc)
c = tc;
}
ustr[j++] = c;
if (c < 0x80)
nlen++;
else if (c < 0x800)
nlen += 2;
else if (c < 0x10000)
nlen += 3;
else if (c < 0x110000)
nlen += 4;
else {
[self freeMemory: ustr];
@throw [OFInvalidEncodingException newWithClass: isa];
}
i += clen;
}
@try {
nstr = [self allocMemoryWithSize: nlen + 1];
} @catch (id e) {
[self freeMemory: ustr];
@throw e;
}
j = 0;
for (i = 0; i < ulen; i++) {
if ((d = of_string_unicode_to_utf8(ustr[i], nstr + j)) == 0) {
[self freeMemory: ustr];
[self freeMemory: nstr];
@throw [OFInvalidEncodingException newWithClass: isa];
}
j += d;
}
assert(j == nlen);
nstr[j] = 0;
[self freeMemory: ustr];
[self freeMemory: string];
string = nstr;
length = nlen;
}
- (void)setToCString: (const char*)str
{
size_t len;
[self freeMemory: string];
len = strlen(str);
switch (of_string_check_utf8(str, len)) {
case 0:
isUTF8 = NO;
break;
case 1:
isUTF8 = YES;
break;
case -1:
string = NULL;
length = 0;
isUTF8 = NO;
@throw [OFInvalidEncodingException newWithClass: isa];
}
length = len;
string = [self allocMemoryWithSize: length + 1];
memcpy(string, str, length + 1);
}
- (void)appendCString: (const char*)str
{
size_t strlength;
strlength = strlen(str);
switch (of_string_check_utf8(str, strlength)) {
case 1:
isUTF8 = YES;
break;
case -1:
@throw [OFInvalidEncodingException newWithClass: isa];
}
string = [self resizeMemory: string
toSize: length + strlength + 1];
memcpy(string + length, str, strlength + 1);
length += strlength;
}
- (void)appendCString: (const char*)str
withLength: (size_t)len
{
switch (of_string_check_utf8(str, len)) {
case 1:
isUTF8 = YES;
break;
case -1:
@throw [OFInvalidEncodingException newWithClass: isa];
}
string = [self resizeMemory: string
toSize: length + len + 1];
memcpy(string + length, str, len);
length += len;
string[length] = 0;
}
- (void)appendCStringWithoutUTF8Checking: (const char*)str
{
size_t strlength;
strlength = strlen(str);
string = [self resizeMemory: string
toSize: length + strlength + 1];
memcpy(string + length, str, strlength + 1);
length += strlength;
}
- (void)appendCStringWithoutUTF8Checking: (const char*)str
length: (size_t)len
{
string = [self resizeMemory: string
toSize: length + len + 1];
memcpy(string + length, str, len);
length += len;
string[length] = 0;
}
- (void)appendString: (OFString*)str
{
if (str == nil)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
[self appendCString: [str cString]];
}
- (void)appendFormat: (OFString*)fmt, ...
{
va_list args;
va_start(args, fmt);
[self appendFormat: fmt
withArguments: args];
va_end(args);
}
- (void)appendFormat: (OFString*)fmt
withArguments: (va_list)args
{
char *t;
int len;
if (fmt == nil)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if ((len = of_vasprintf(&t, [fmt cString], args)) == -1)
@throw [OFInvalidFormatException newWithClass: isa];
@try {
[self appendCString: t
withLength: len];
} @finally {
free(t);
}
}
- (void)prependString: (OFString*)str
{
return [self insertString: str
atIndex: 0];
}
- (void)reverse
{
size_t i, j, len = length / 2;
madvise(string, len, MADV_SEQUENTIAL);
/* We reverse all bytes and restore UTF-8 later, if necessary */
for (i = 0, j = length - 1; i < len; i++, j--) {
string[i] ^= string[j];
string[j] ^= string[i];
string[i] ^= string[j];
}
if (!isUTF8) {
madvise(string, len, MADV_NORMAL);
return;
}
for (i = 0; i < length; i++) {
/* ASCII */
if (OF_LIKELY(!(string[i] & 0x80)))
continue;
/* A start byte can't happen first as we reversed everything */
if (OF_UNLIKELY(string[i] & 0x40)) {
madvise(string, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 1 || !(string[i + 1] & 0x80))) {
madvise(string, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Next byte is the start byte */
if (OF_LIKELY(string[i + 1] & 0x40)) {
string[i] ^= string[i + 1];
string[i + 1] ^= string[i];
string[i] ^= string[i + 1];
i++;
continue;
}
/* Second next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 2 || !(string[i + 2] & 0x80))) {
madvise(string, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Second next byte is the start byte */
if (OF_LIKELY(string[i + 2] & 0x40)) {
string[i] ^= string[i + 2];
string[i + 2] ^= string[i];
string[i] ^= string[i + 2];
i += 2;
continue;
}
/* Third next byte must not be ASCII */
if (OF_UNLIKELY(length < i + 3 || !(string[i + 3] & 0x80))) {
madvise(string, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
/* Third next byte is the start byte */
if (OF_LIKELY(string[i + 3] & 0x40)) {
string[i] ^= string[i + 3];
string[i + 3] ^= string[i];
string[i] ^= string[i + 3];
string[i + 1] ^= string[i + 2];
string[i + 2] ^= string[i + 1];
string[i + 1] ^= string[i + 2];
i += 3;
continue;
}
/* UTF-8 does not allow more than 4 bytes per character */
madvise(string, len, MADV_NORMAL);
@throw [OFInvalidEncodingException newWithClass: isa];
}
madvise(string, len, MADV_NORMAL);
}
- (void)upper
{
[self _applyTable: of_unicode_upper_table
withSize: OF_UNICODE_UPPER_TABLE_SIZE];
}
- (void)lower
{
[self _applyTable: of_unicode_lower_table
withSize: OF_UNICODE_LOWER_TABLE_SIZE];
}
- (void)insertString: (OFString*)str
atIndex: (size_t)idx
{
size_t nlen;
if (isUTF8)
idx = of_string_index_to_position(string, idx, length);
if (idx > length)
@throw [OFOutOfRangeException newWithClass: isa];
nlen = length + [str cStringLength];
string = [self resizeMemory: string
toSize: nlen + 1];
memmove(string + idx + [str cStringLength], string + idx, length - idx);
memcpy(string + idx, [str cString], [str cStringLength]);
string[nlen] = '\0';
length = nlen;
}
- (void)deleteCharactersFromIndex: (size_t)start
toIndex: (size_t)end
{
if (isUTF8) {
start = of_string_index_to_position(string, start, length);
end = of_string_index_to_position(string, end, length);
}
if (start > end)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if (end > length)
@throw [OFOutOfRangeException newWithClass: isa];
memmove(string + start, string + end, length - end);
length -= end - start;
string[length] = 0;
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteCharactersInRange: (of_range_t)range
{
[self deleteCharactersFromIndex: range.start
toIndex: range.start + range.length];
}
- (void)replaceCharactersFromIndex: (size_t)start
toIndex: (size_t)end
withString: (OFString*)repl
{
size_t nlen;
if (isUTF8) {
start = of_string_index_to_position(string, start, length);
end = of_string_index_to_position(string, end, length);
}
if (start > end)
@throw [OFInvalidArgumentException newWithClass: isa
selector: _cmd];
if (end > length)
@throw [OFOutOfRangeException newWithClass: isa];
nlen = length - (end - start) + [repl cStringLength];
string = [self resizeMemory: string
toSize: nlen + 1];
memmove(string + end, string + start + [repl cStringLength],
length - end);
memcpy(string + start, [repl cString], [repl cStringLength]);
string[nlen] = '\0';
length = nlen;
}
- (void)replaceCharactersInRange: (of_range_t)range
withString: (OFString*)repl
{
[self replaceCharactersFromIndex: range.start
toIndex: range.start + range.length
withString: repl];
}
- (void)replaceOccurrencesOfString: (OFString*)str
withString: (OFString*)repl
{
const char *str_c = [str cString];
const char *repl_c = [repl cString];
size_t str_len = [str cStringLength];
size_t repl_len = [repl cStringLength];
size_t i, last, tmp_len;
char *tmp;
if (str_len > length)
return;
tmp = NULL;
tmp_len = 0;
for (i = 0, last = 0; i <= length - str_len; i++) {
if (memcmp(string + i, str_c, str_len))
continue;
@try {
tmp = [self resizeMemory: tmp
toSize: tmp_len + i - last +
repl_len + 1];
} @catch (id e) {
[self freeMemory: tmp];
@throw e;
}
memcpy(tmp + tmp_len, string + last, i - last);
memcpy(tmp + tmp_len + i - last, repl_c, repl_len);
tmp_len += i - last + repl_len;
i += str_len - 1;
last = i + 1;
}
@try {
tmp = [self resizeMemory: tmp
toSize: tmp_len + length - last + 1];
} @catch (id e) {
[self freeMemory: tmp];
@throw e;
}
memcpy(tmp + tmp_len, string + last, length - last);
tmp_len += length - last;
tmp[tmp_len] = 0;
[self freeMemory: string];
string = tmp;
length = tmp_len;
}
- (void)deleteLeadingWhitespaces
{
size_t i;
for (i = 0; i < length; i++)
if (string[i] != ' ' && string[i] != '\t' &&
string[i] != '\n' && string[i] != '\r')
break;
length -= i;
memmove(string, string + i, length);
string[length] = '\0';
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteTrailingWhitespaces
{
size_t d;
char *p;
d = 0;
for (p = string + length - 1; p >= string; p--) {
if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')
break;
*p = '\0';
d++;
}
length -= d;
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- (void)deleteLeadingAndTrailingWhitespaces
{
size_t d, i;
char *p;
d = 0;
for (p = string + length - 1; p >= string; p--) {
if (*p != ' ' && *p != '\t' && *p != '\n' && *p != '\r')
break;
*p = '\0';
d++;
}
length -= d;
for (i = 0; i < length; i++)
if (string[i] != ' ' && string[i] != '\t' &&
string[i] != '\n' && string[i] != '\r')
break;
length -= i;
memmove(string, string + i, length);
string[length] = '\0';
@try {
string = [self resizeMemory: string
toSize: length + 1];
} @catch (OFOutOfMemoryException *e) {
/* We don't really care, as we only made it smaller */
[e release];
}
}
- copy
{
return [[OFString alloc] initWithString: self];
}
@end